Yes I know that, and already know how to fix them properly. When you access the file /etc/rkhunter.conf and compare it from both Mint Daryna and Ellysa, I found that the SCRIPTWHITELISTs are not the same. In particular, the file of Daryna has shown:

Allow the specified commands to be scripts.# One command per line (use multiple SCRIPTWHITELIST lines).##SCRIPTWHITELIST=/sbin/ifup#SCRIPTWHITELIST=/sbin/ifdownSCRIPTWHITELIST=/usr/bin/groupsSCRIPTWHITELIST=/bin/egrepSCRIPTWHITELIST=/bin/fgrepSCRIPTWHITELIST=/bin/whichSCRIPTWHITELIST=/usr/bin/lddSCRIPTWHITELIST=/usr/bin/lwp-requestSCRIPTWHITELIST=/usr/sbin/adduserSCRIPTWHITELIST=/usr/sbin/prelink

But in Elyssa, it is like this:

Allow the specified commands to be scripts.# One command per line (use multiple SCRIPTWHITELIST lines).##SCRIPTWHITELIST=/sbin/ifup#SCRIPTWHITELIST=/sbin/ifdownSCRIPTWHITELIST=/usr/bin/groups

I intend to copy the rest to Elyssa but first I need to check their md5sum to validate security.